flatau



(No Model.)

I L.S.FLATAU. GHEMIGAL FIRE EXTINGUISHER. I

No. 552,427; Patented Dec. 31, 1895.

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ANDREW B GRAHAMJNDTO'UT'IQWASNINGTUH I")v UNITED STATES PATENT OFFICE.

LOUIS S. FLATAU, OF DALLAS, TEXAS, ASSIGNOR OF ONE-HALF TO WILLIAM H.ROBINSON, OF SAME PLACE.

CHEMICAL FIRE-EXTINGUISHER.

SPECIFICATION forming part of Letters Patent No. 552,427, dated December31, 1895.

Application filed December 15, 1894;. Serial No. 531,877. (No model.)

To all whom it may concern.-

Be it known that I, LOUIS S. FLAIA'U, a citizen of the United States,and a resident of Dallas, in the county of Dallas and State of Texas,have invented certain new and useful Improvements in ChemicalFire-Extinguishers; and I do hereby declare that the following is afull, clear, and exact description of the invention, which will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawing, which forms apart of this specification.

My invention relates to chemical fire-extinguishers, and its object isto provide an improved acid-receptacle which will obviate the objectionsto the ordinary acid-bottles now in use.

The invention consists in the novel construction and combination ofparts hereinafter fully described and claimed. In the accompanyingdrawing the figure represents a longitudinal sectional view of alire-extinguisher constructed in accordance with my invention.

In the said drawing the reference-numeral 1 designates an ordinarycylinder such as is commonly employed in hand fire-extinguishers forcontaining the water and chemicals.

The numeral 2 designates the top of the cylinder provided with acylindrical screwthreaded boss 3, with which engages acorrespondingly-threaded cap l, having a pipe 5 communicating with theinterior of the cylinder. This pipe is adapted to receive a hose and atits inner end is provided with a wiregauze strainer 6.

The reference numeral 7 designates the acidbottle,wliich may be made ofany suitable material, preferably of 1netal,which will not be affectedby the acid. This bottle consists of a cylinder closed at the top andprovided with a filling-orifice closed by a stopper of lead or rubber.The lower end of this cylinder is formed with an inwardly-extendingannular flange 8, with which is connected an interior short cylinder ortube 9 concentric with the outer cylinder.

In charging the extinguisher water and marble-dust or other suitablematerial are placed therein as usual. The bottle is then partly filledwith acid and the filling-orifice then closed by the'sto per. The bottleis then placed in the cyllnder 1 and the sulphuric acid contained in thebottle being much heavier than water will cause the bottle to gentlysink to the bottom, where it will remain in an upright position, the airin the bottle being compressed as it sinks, forming a water-seal andpreventing the entrance of water into the bottle. The bottle should beof such a length as to strike the interior of the cylinder 1 when thelatter is tipped or subjected to rough usage, and thereby prevented fromfalling over and breaking the water-seal.

When the apparatus is to be used it is turned upside down, when thebottle will commence to fall to the opposite end of cyl-- inder 1. Thiswill break the water-seal and cause the acid and water to commingle andcarbonic-acid gas to be generated, and the water thus impregnated withthe gas to be forced through the hose, as is well understood.

- The numeral 10 designates handles at top and bottom of the apparatusfor facilitating the turning of the latter upside down.

In the drawing the letter A indicates the water-level in cylinder 1, Bthe acid-level in the bottle, and O the level of the water in the bottlewhich forms the seal.

Having thus fully described my invention, what I claim is In a chemicalfire extinguisher, the combination with the liquid cylinder, of the acidbottle consisting of a cylinder, the annular flange at the lower endthereof and the short concentric cylinder secured to said flange, theconstruction being such that when the acid bottle is immersed in theliquid in the cylinder, a water seal to retain the air therein will beformed which is broken when the bottle is inverted, substantially asdescribed.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

E. B. GIVANS, J. R. CARD.

